TABLE 2.

Impact of exogenous shock on reported prevalence of LBP and proportion of medical visits for LBP

	Fuzzy RD			Sharp RD
	Self‐reported LBP			Medical visits
No Covariates Included
Bins
9 months of observations to the left of the cutoff	20 614	20 614	20 614	52 993
9 months of observations to the right of the cutoff a	20 582	20 582	20 582	59 213
First‐Stage Estimate of Psychological Distress (K6)	(K6 ≥ 4)	(K6 ≥ 3)	(K6 ≥ 1)	—
Coefficient	−0.089***	−0.107***	−0.134***	—
Robust bias‐corrected standard error	0.020	0.021	0.024	—
Treatment effect
Coefficient	0.770**	0.633**	0.460	−0.008**
Robust bias‐corrected standard error	0.397	0.301	0.268	0.004
Covariates included
Bins
9 months of observations to the left of the cutoff	20 349	20 349	20 349	52 993
9 months of observations to the right of the cutoff a	20 254	20 254	20 254	59 213
First‐stage Estimate of Psychological Distress (K6)	(K6 ≥ 4)	(K6 ≥ 3)	(K6 ≥ 1)	—
Coefficient	−0.092***	−0.112***	−0.140***	—
Robust bias‐corrected standard error	0.019	0.021	0.023	—
Treatment effect
Coefficient	0.850**	0.694***	0.496**	−0.008**
Robust bias‐corrected standard error	0.361	0.274	0.253	0.004

Estimates of the effect of nonspecific psychological distress on the experience of LBP using fuzzy RD models and estimates of a concomitant effect on medical visits for LBP where the primary reason for the medical visit was LBP using a sharp RD model.

Abbreviation: RD, regression discontinuity.

**P ≤ .05, ***P ≤ .01.

^aNine months beyond the discontinuity point for a total of 10 months.